What family heirloom has been passed down to you and/or what would you want to pass down to your next of kin?

Another one of mine is a genealogy book that traces back to our first ancestor. It's been passed down through the males of the family but since my dad only had two daughters, I plan on keeping it (instead of my older sister)! It's been updated with our names and I'd like to pass it down to my future children.